package org.deltaset.faces.upload;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

import org.apache.commons.fileupload.servlet.ServletFileUpload;

public class FileUploadFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException {
        final HttpServletRequest httpServletRequest = (HttpServletRequest) request;
        boolean isMultipart = ServletFileUpload.isMultipartContent(httpServletRequest);

        if (true == isMultipart) {
            final MultipartRequestWrapper multipartRequest = new MultipartRequestWrapper(httpServletRequest);
            filterChain.doFilter(multipartRequest, response);
        } else {
            filterChain.doFilter(request, response);
        }
    }

    @Override
    public void destroy() {
    }
}
